Boss Audio Systems PH1500M User Manual page 9

High Level Input Wiring
The high level input(s) should only be used when your head unit lacks RCA outputs.
If the RCA outputs are not present, connect the speaker outputs from the receiver
to the high level input connector of the amplifier. Be sure to observe polarity to
avoid audio phase problems.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
MonoBlock Amplifier
PH1500M and PH2500M
POWER
R
HIGH LEVEL
INPUTS
R+ R-
To Speaker Terminals
of head unit
R
L
2V-8V min
max
100mV-2V
INPUT INPUT
SENSITIVITY LEVEL
LOW INPUTS
L
L- L+
LOW
0 +18dB 45Hz 90Hz
FULL
BASS MODE LOW PASS
BOOST FREQUENCY
CROSSOVER
M OSF E T M ONOBL OCK POWE R AM PL I FI E R
Remote
Subwoofer Level Control
PHANTOM MOSFET Amplifier User's Manual - page 9
PROTECTION
REMOTE SUBWOOFER
LEVEL CONTROL